Coil winding machine



Fb. 5, 1957 w. H. STEGER 0011. WINDING MACHINE 7 Filed Dec. 14, 1955 5 Sheets-Sheet 1 FIETU fzzderz for: /srzzer H5256 e7" Feb. 5, 1957 w. H. STEGER con. WINDING MACHINE 5 Sheets-Sheet 2 Filed Dec. 14, 1955 Feb. 5, 1957 w. H. STEGER 7 2,780,246

con. WINDING MACHINE Filed Dec. 14, 1955 5 Sheefs-Sheet a Feb. 5, 1957 w. H. STEGER 2,780,246

COIL WINDING MACHINE Filed Dec. 14, 1955 s Sheets- Sheet 4 1 II] L'l Jll 6 FIEE H 97 47 ii Ll J72 z/iz 1507 Wiervzer 15315 flags?" Feb. 5, 1957 w. H. STEGER 2,780,246

COIL WINDING MACHINE Filed Dec. 14, 1955 5 Sheets-Sheet 5 M "%me 2,780,246 COIL WINDING MACHINE Werner H. Steger, Chicago, Ill. Application December 14, 1955, Serial No. 553,067

16 Claims. (Cl. 140-922) This invention is concerned with a machine for winding beam deflection coils, particularly for use in television receivers.

One object of the invention is to provide a machine comprising a rotatable support adapted to have an elongated coil form mounted thereon, a wire feed including a wire guide adjacent said coil form support and adapted for relative longitudinal movement with respect thereto, a first drive means for effecting intermittent rotational reciprocation of the coil form support, and a second drive means for effecting intermittent longitudinal reciprocation between the wire guide and the coil form support. Another object is to provide such a machine in which the coil form is mounted eccentrically with respect to the axis of rotation of the support. A further object is to provide first drive means which also effect movement of the wire guide away from and toward the axis of the coil form support during rotation of the support.

Still another object is to provide a first drive means which causes rotation of the support of less than 360. Yet a further object is to provide a brake for stopping rotation of the coil form support and which is operated in accordance with the operation of the drive means.

The apparatus of the invention is illustrated in a preferred embodiment in the accompanying drawings, in which:

Figure l is an end elevational view of the coil winding machine;

Figure 2 is a vertical sectional view taken longitudinally through the machine substantially along line 2-2 of Figure 1;

Figure 3 is a top plan view thereof;

Figure 4 is an enlarged sectional view taken substantially along line 4--4 of Figure 2;

Figure 5 is an enlarged sectional view taken along line 5-5 of Figure 2;

Figure 6 is a schematic diagram of the brake control circuit;

Figure 7 is an enlarged sectional view taken substantially along line 7-7 of Figure 2;

Figure 8 is an enlarged sectional view taken substantially along line 8-8 of Figure 2;

Figure 9 is a top plan view of the drive cam;

Figure 10 is a side view thereof;

Figure 11 is a fragmentary sectional view of the wire guide support rod drive connection; and

Figure 12 is a perspective view of a coil wound on the machine.

The advent of television has created an ever increasing demand for the deflection coils which are placed around the neck of a cathode-ray picture tube of television receivers and have currents supplied thereto which in turn control the deflection of the electron beam to sweep the face of the tube. In Figure 12, a representative coil segment of a deflection coil assembly is shown. It will be understood that the deflection coil assembly is made up of a plurality, usually four, such coil segments spaced around the neck of the tube. The coil segment 20 has 2,780,246 Patented Feb. 5, 19 57 elongated portions. 20a and 20b which extend longitudinally of the cathode-ray tube neck and are joined at either end of the coil by arcuate or fan-shaped portions 200 and 20d. The portion 20d in the coil shown is formed so that it will fit snugly about the enlarged body of the cathode-ray picture tube forwardly of the neck portion thereof.

Turning now to Figures 1, 2 and 3 of the drawings, the coil winding machine is shown mounted on a stand including legs 21 and cross members 22. A pair of spaced upright members 23 and 24 are mounted at either end of the stand. A coil form support member or arbor 25 is rotatably carried on aligned shaftsegments 26 and 27 which are journalled in bearings provided in upright members 23 and 24, respectively. A third upright member 28 provides an auxiliary bearing for shaft segment 27. The arbor 25 has secured thereto a plurality of coil forms, as 29 and 30, which are suitably constructed to form the Wire wound thereon into the configuration desired, as for example that shown in Figure 12. It will be noted that arbor 25 is eccentrically mounted with respect to the axis of shaft segments 26 and 27. This compensates for the irregular shape of the coil form and places the center of gravity approximately on the axis of rotation.

A wire feeding mechanism indicated generally as 33 is mounted on the stand alongside coil form 29. Only one mechanism is shown in the drawings in the interest of simplicity, it being understood that in practice there will be a similar feeding mechanism provided for each of the coil forms carried on the coil form support 25. The wire feeding mechanism includes a coil of wire 34 and a plurality of sheaves 35a, 35b and 35c around which the wire is strung. Sheave 35b is carried at one end of a pivotally mounted arm 36 and is urged against the wire 34 by a spring 36a to maintain the necessary tension. The wire leaving sheave 35c passes through a wire guide loop 37 to the coil form 29. Wire guide 37 is carried on a rod 38 slidingly carried in a pair of blocks 39 and 40, for reciprocation longitudinally of the machine. The

blocks 39 and 40 are slidably mounted in vertical guides 41 and 42, respectively, provided on the end members 23 and 24. The Wire feed sheave 35c, wire guide 37 and coil guide 29 are so positioned that the wire 34 is not excessively bent as it passes through the guide and to the coil form 29.

The machine is driven by an electric motor 31 connected by a belt drive 310, transmission 32 and chain drive 43 to a rotating drive shaft 44 which extends upwardly into a housing 45. Carried within the housing 45 are two yoke members 46 and 47 each of which comprises an open centered rectangular frame slidably carried in suitable guides within the housing. As best seen in Figure 7, the lower yoke 46 is mounted for sliding movement longitudinally of the machine while the upper yoke 47 is mounted for movement transversely thereof. The rotating drive shaft 44 extends through the openings formed by the rectangular yoke frames 46 and 47 and has mounted. thereon cam means including an arm 48 which extends radially of the shaft between the yokes 46 and 47. A pin 49 extends vertically through outer end of arm 48 and has mounted thereon rollers 50 and 51, one being above the arm and the other below. As the drive shaft 44 rotates, the rollers 50 and 51 successively engage opposite interior surfaces of the rectangular yokes 46 and 47, moving them alternately back and forth in their respective guides.

The inner wall of each frame is relieved adjacent the point at which the roller strikes it, as indicated at 55 on yoke 47. A strip of spring steel 56 is bolted to the interior of the yoke frame opening opposite the point of roller impact and has its free end inserted in a slot protla'which extend throughopenings in top of housing45 and are secured to the upper yoke 47. A rack 61 is carried by-the rack support and engages a pinion '62 affixed toshaft segment 2'7. Thus, as yoke 47'is caused to move back and =forth tllltl61'-"[ll6-3Cll01l of thecam means carried on drive shaft -44, rotary reciprocation of the coil form support 25 is eifected. Coil form support is rotated slightly less than a full turn, and preferably about 330.

Secured to the lower yoke 46 is arm 63 which has an upturned ear-63a at theend thereof. A lever arm 64 is pivotally mounted, at a point intermediate its ends, and is provided at its lower end witha-slot 64a which engages a pin 65 atfixed to the car 6311. The oppositeend of'lever arm 64 is provided with a similarelongated slot 64b which engages a pin-66 carried by a plate 67 slidably mounted in guideways 68 for movement longitudinally of the machine. Extending upwardly from plate 67 is a bushing-67awhich slidaoly receives a rod 69 that has formed at its upper end a collar portion 70 through Whiohthe end of wire guide support rod 38 passes. A bolt 71 is threaded through collar 70 and engages rod 38 locking the two together for longitudinal movement. As yoke 46is caused to move back and forth under the action of the cam means carried on the drive shaft 44, longitudinal reciprocation of the wire guide support rod 38 is effected; and this longitudinal reciprocation and the rotary reciprocation of the coil form support 25 occur alternately. Pin 66 is mounted in an elongated slot 66a permitting adjustment of the longitudinal movement of rod 38.

It is desirable that the wire guide 37 be mounted as close to the coil form 29 as possible so that wire breakage is minimized. However, the coil form is not symmetrical with the axisof-rotation of the coil form support and, in order to keep the wire guide as close as possible to the format all times, the wire guide support rod 38 is mounted in sliding blocks 39 and 4-0, as previously described. A pair ofcranks'73 and'74 are connected between eccentric pins 75 and '76, carried on the shaft segments 27 and 26, and the sliding blocks 39 and 40. Thus, as the coil form 29 is Irotated the wire guide 37 'is raised and lowered in-synchronism therewith. The longitudinal position of the wire guides 37 may be varied simultaneously by adjusting the'thread'ed section 380 in rod38.

A brake is provided to stop the rotational movement of the coil form support and reduce the mechanical pounding of the upper yoke 47 which would otherwise occur, due .in'part-to the rather great weight of the rotating coil forms. The brake includes a split band '77 carried by a bracket 77a mounted on upright member 28 and encircling brake disc '78 carried on the shaft segment 27. A lever arm 79 is pivotally connected to one end of the'band '77 and is connected through a link 80 to the OilttZl'-Ctld. A spring Simounted on the link urges the ends of the band apart, out of contact with disc 78. The free end of lever arm 79 is connected to the armature has: of a solenoid 82 which when energized draws the armature downwardly causing the brake band to engage disc 78. When the energization circuit of the solenoid '82 isbrcken, arm 79 is released and spring '81 insures release of the brake. The tension applied by the brake may be adjusted by a nut Stla on link 80.

The energization circuit for the solenoid 8'2 is shown in Figure 6 and includes a pair of leads-83 and "84-which maybe connected to -a suitable source of power (not shown) Two parallel 'energization circuits'are provided,

the first including .series connected switches 85 and 86, and the second including series connected switches 87 and 88. Switches 85 and 86 are mounted on either side of housing 45 (Figure 2) to be engaged by lower yoke 46 at either end of its travel. Switches 86 and 88 are mounted on hearing support 28 for engagement with a switch operating extension 89-carried above the rack 61, and are closed when the rack is at either end of its path of travel. Assuming thatswitch 85 has just closed, i. e., that yoke 46 is in its right-hand position as viewed in Figure 2, the next movement of the drive mechanism moves the rack 61 to the right as viewed in Figure 5. As the rack nears the end of its path of travel, switch 86 is closed energizing brake solenoid 82 and applying the brake to the rotating coil support. Before the rack is again moved in the opposite direction, however, lower yoke 46 has been moved to the left position (Figure 2), switch 85 opened and switch 87 closed. Thus when the coil form support starts'to turn, the brake has been released.

The over-all operation of the machine will now be considered briefly. The desired number of coil forms are secured to support member 25 and the end of wire 34 from the individual wire feed mechanisms secured to each. The machine then may be placed in operation. The coil forms are first rotated to form the wire into end portion 20c of the coil segment; then the wire guide rod 38 is traversed longitudinally to the dotted line position shown in Figure 2 forming the wire into the longitudinally extending portion 20a of the coil segment. The coil forms are then rotated forming the next portion of wire into a conductor in the coil segment 20d and the wireguide rod 38 traversed in the opposite direction to forma conductor in coil segment 20b. The operation is then repeated until the desired number of turns are placed onthe coil form.

Referring to Figures 8 and 11, it will be seen that wire guide 37 is permitted to oscillate through a limited are as the coil form support 25 rotates, permitting the wire 34 to align itself between sheave 35c and the coil form. This is accomplished byproviding a circumferential slot 38b in wire guide support rod 38 into which the drive bolt 71 extends.

The foregoing detailed description is given for clearness of understanding only and no unnecessary limitafirst drive means for effecting intermittent rotational reciprocation of said coil form support; and a second drive means for effecting intermittent longitudinal receprocation between said wire guide and coil form support.

2. A coil winding machine of the character described in claim 1, wherein said first and second drive means are interconnected to operate alternately.

3. A coil winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon, the coil form being mounted cccentricaliy with respect to the axis of rotation of the support; a wire feed including a wire guide adjacent said coil form support and adapted for relative longitudinal movement with respect thereto; a first drive means for effecting intermittent rotational reciprocation of said coil form support; and a second drive means for effecting intermittent longitudinal reciprocation between said wire guide and coil form support.

4. A coil winding machine of the character described in claim 3, wherein the first drive means effects movement of the wire guide away from and toward the axis of rotation of the coil form support during rotation of the coil form support.

5. A coil winding machin: for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon; a wire feed including a wire guide adjacent said coil form support and adapted for relative longitudinal movement with respect thereto; a first drive means for effecting intermittent rotational reciprocation of said coil form support, the rotation of said support being less than 360; and second drive means for effecting intermittent longitudinal reciprocation between said wire guide and coil form support.

6. A coil winding machine of the character described in claim 5, wherein said first drive means effects rotation of the coil form support of the order of 330.

7. A winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon; a wire feed including a wire guide adjacent said coil form support and adapted for relative longitudinal movement with respect thereto; a first drive means for effecting intermittent rotational reciprocation of said coil form support; a second drive means for effecting intermittent longitudinal reciprocation between said wire guide and coil form support; and a brake for stopping rotation of said coil form support.

8. A winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon; a wire feed including a wire guide adjacent said coil form support and adapted for relative longitudinal movement with respect thereto; a first drive means for eifecting intermittent rotational reciprocation of said coil form support; a second drive means for effecting intermittent longitudinal reciprocation between said wire guide and coil form support; an electric brake for stopping rotation of said coil form support; and a circuit for operating said brake and including switches operated in accordance with the operation of said first and second drive means.

9. A winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon; a wire feed including a wire guide adjacent said coil form support and adapted for relative longitudinal movement with respect thereto, the wire guide being movably mounted to align itself with the Wire during feeding thereof; a first drive means for effecting intermittent rotational reciprocation of said coil form support; and a second drive means for eifectin'g intermittent longitudinal reciprocation between said wire guide and coil form support.

10. A winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon; a wire feed including a wire guide adjacent said coil form support and adapted for relative longitudinal movement with respect thereto; a rotating drive shaft; a first yoke connected to said rotatable support; a second yoke connected to said wire guide; and a cam on said drive shaft for alternately rcciprocating said yokes to cause alternate rotational reciprocation of the coil form support and longitudinal reciprocation of the wire guide.

11. A coil winding machine of the character described 6 in claim 10, wherein said yokes have a resilient buffer portion against which said cam strikes.

12. A winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon; a wire feed including a wire guide mounted adjacent said coil support on a rod movable longitudinally thereof; a rotating drive shaft; a first yoke; a rack and pinion connected between said first yoke and said rotatable coil form support; a second yoke; a lever connected between said second yoke and said rod; and a cam on said drive shaft for alternately reciproeating said yokes to effect alternate rotational reciprocation of the coil form support and longitudinal reciprocation of the wire guide support rod.

13. A machine of the character described in claim 12, wherein said wire guide support rod has limited rotational freedom whereby the wire guide may align itself with the wire.

14. A coil winding machine of the character described in claim 12, wherein said wire feed support rod is adjustable longitudinally.

15. A winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon, the coil form being mounted eccentrically with respect to the axis of rotation of the support; a wire feed including a wire guide mounted adjacent said coil form support on a longitudinally movable rod, the rod being carried in supports movable away from and toward the coil form support; a rotating drive shaft; a first yoke connected to said rotatable coil support; a second yoke connected to said wire guide rod; a cam on said drive shaft for alternately reciprocating said control yokes to cause alternate rotational reciprocation of the coil form support and longitudinal reciprocation of the wire guide rod; and a crank connected between said coil form support and wire guide rod for efiecting movement of said rod away from and toward the coil form support during rotation of the coil form support.

16. A winding machine for beam deflection coils, comprising: a rotatable support adapted to have an elongated coil form mounted thereon; a wire feed including a wire guide mounted adjacent said support on a rod movable longitudinally thereof; a rotating drive shaft; first drive means including a first yoke connected with said coil form support by a rack and pinion; second drive means including a second yoke connected with said wire guide rod by a lever; a cam on said drive shaft for alternately reciprocating said yokes for effecting alternate rotational reciprocation of said coil form support and longitudinal reciprocation of said wire guide support rod; an electrically operated brake associated with said coil form support; a circuit, including a plurality of switches associated with said drive means, for energizing said brake at the end of each period of rotation of the coil form support.

References Cited in the file of this patent UNITED STATES PATENTS 

